Comment lines in FSTAB using perl Post: 302671875

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Top Forums Shell Programming and Scripting Comment lines in FSTAB using perl Post 302671875 by bakunin on Saturday 14th of July 2012 10:53:17 PM

07-14-2012

Registered User

Are you insisting in PERL? Because in fact this is a simple operation and to use PERL for this is probably overkill of the extreme sort. The following solution is sed and will do the job:

Code:

sed 's/^[<spc><tab>]*zin46fil01:\/vol\/fil01vol09\/soft1\/\_TOOLS_\/dist \/_TOOLS_\/.dist15/# &/' /etc/fstab > /tmp/sed.$$
mv /etc/fstab /etc/fstab.${DATE}
mv /tmp/sed.$$ /etc/fstab

I assumed the variable "$DATE" here, which is part of my environment, because i like to have date-coded backup files if i let something change via a script. If you don't have such a variable either create one before or even dump the command altogether if you don't need a backup copy.

Replace "<spc>" and "<tab>" with literal spaces/tabs. If you have more than one line to comment out just duplicate the line and change the path accordingly. The "&" in the replacement part means "everything matched by the regexp before":

Code:

sed 's/^[<spc><tab>]*\/path\/to\/mount1/# &/
     s/^[<spc><tab>]*\/path\/to\/mount2/# &/' /etc/fstab > /tmp/sed.$$
mv /etc/fstab /etc/fstab.${DATE}
mv /tmp/sed.$$ /etc/fstab

I hope this helps.

bakunin

bakunin

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LEARN ABOUT OSX

xml::libxml::comment

XML::LibXML::Comment(3) 				User Contributed Perl Documentation				   XML::LibXML::Comment(3)

NAME

       XML::LibXML::Comment - XML::LibXML Comment Class

SYNOPSIS

	 use XML::LibXML;
	 # Only methods specific to Comment nodes are listed here,
	 # see XML::LibXML::Node manpage for other methods

	 $node = XML::LibXML::Comment->new( $content );

DESCRIPTION

       This class provides all functions of XML::LibXML::Text, but for comment nodes. This can be done, since only the output of the node types is
       different, but not the data structure. :-)

METHODS

       The class inherits from XML::LibXML::Node. The documentation for Inherited methods is not listed here.

       Many functions listed here are extensively documented in the DOM Level 3 specification (http://www.w3.org/TR/DOM-Level-3-Core/
       <http://www.w3.org/TR/DOM-Level-3-Core/>). Please refer to the specification for extensive documentation.

       new
	     $node = XML::LibXML::Comment->new( $content );

	   The constructor is the only provided function for this package. It is required, because libxml2 treats text nodes and comment nodes
	   slightly differently.

AUTHORS

       Matt Sergeant, Christian Glahn, Petr Pajas

VERSION

       2.0008

COPYRIGHT

       2001-2007, AxKit.com Ltd.

       2002-2006, Christian Glahn.

       2006-2009, Petr Pajas.

perl v5.16.2							    2012-10-22						   XML::LibXML::Comment(3)

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